Feeding device for furnace-grates.



G. H. THCHER, JR.

FEEDING DEVICE FOR,FURNACE GRATES.

APPLICATION mzvoc. 22, 19:2.

Patented Apr. 6, 191.5.

ree-D lle known tha l, 'Gnome l-ll. Tirwiinu, fir.. u, citizen of he United States, residingI et Albany, county Albany, und leitete of Blew York, here invented certain new und useful Improvements in Feeding Devices ior Furnace-limites; and l do hereby (leclare the Jfollowing lo be a full, clear, and exact description oi he invention, -such us will enable ohers skilled in the arl` co which it upperuins 'o Hieke and. use thesaxne.

invenion relates to certain new and useful improremens in fuel-feeding devices or seuin-boiler und other furnaces, and it relates particularly to that type of fuel feeders wherein ,the fuel is supplied from :i hopper to n feed scigew operating in a longi- 'buclinul trough from which the fuel is received, on' both sides of the trough, upon inclined grates located at the foot of the inclines.

Frior to my present invention', 1i has been considered necessary, for practical purposes,

luit the conveyer blades of 'that portion of.

oui; the entire length of the screw, prowicledA that certain iro'visions are made, es hereinafter sei; iorl'u, for facilitating ehe feeding operziion and also for insuring the uniform raising;f :incl elistrioution of the fuel in lie magazine. "fo this end, in accordance with my inven'eion, l enti ely omiib ehe cylindrical passageway referred to, und admit the fuel from )the hopper directly upon the conveyer blades of the feed screw, and provide the seine pitch for ehe conveyer blades from enfl io end of the eedscrew, the arrangement being 'further such that the conveyor lole'es terminate nl; :i suitable distance from 'bhe further end oi the magazine. By this construction and arrangement, the fuel received from the hopper upon the iniiel convey/'er blades of she screw is 'feel forward,

irihout any liability wherever eliolin" on irs we); "ro rhe nuigueine noriion 'rougli, `lull cleurnnee provided reason of he absence of he cylinclricel szigeiruy hereiofore of/eil. So also; erminn'ting the conveyer blades e well in advance of che end of @alie ningezine portion or" he enough, l :un enabled 'co reise lle fuel in lie uniform manner reu 't site for ille proper diserioution oT the top edges of the znuejzizine and upon inclinerl w @out employing called raising blades o rliferen; and les. er pitch than ille inn el conreyer hlees.

ln the accompanying drawing, l here illustrated' the preferred consimili/allen einu bodying my invencion.

Figure l represens longiurlinel tional View, partly in elereaion, my iniproved feeding' rlei'ices, es applied lao n,

eig 2 repreeenlzs s eem boiler furnace. cross-sectionnl vier.' thereof, Similar letters iniliesre similar both views. Referring ro the y'r'on well or che steam boiler furnace, of any suitable es, for insenee, iblie l waer tube boiler loe rev/ing, A indioages The hopper C (liscliarges upon the initial conreyer oluiles of ne Ieecl screw, :is slmwnL The feed crew eonsisis 'eziiory slm splined e cenveyer blades of he shells is adaprecl o he opereerr lo. any suitable source of eeel screw operates in che hotiloin 'che crongln incl lerniineses vriiiiin the ma eine section l) hereoi: et e, peine weladvance of the end of elle magazine section, elle space beyond. being occupied ley the plein sle'ei'e ,f es indicare l The enel of the magazine il is oecunied the cnsbing "hi'ch, niej; conveniemly set in lie bridge will ll of the furnace with suitable provision expansien me parts'.

rllhe for 'verdi end oil' the trough cons'zi'lutee a separate casting; (i :is shown, is en poi-eed inhe from 'Well of the iurnecf ulinenient with elle 'magazine seci'aion conununicules wih 'magazine freely. its sirle wells eoincirling from Lche hopper inle 7 on.

.i Erl un o. e 'Ruil ferably o e. ro-

g ideare? there is no opportunity aforded for detention of the fuel or clogging thereof on itsy way from the hopper of the trough into the magazine, The top plate Which may either be integral with the casting, as shown,

or which may be a separate plate, is given an upward inclination reaching from the hopper inlet to the inner Wall ofthe brickwork H, so as to further facilitate the pas sage of the'fuel into the magazine without back-pressure. Should my of the conveyer blades become vvorn or injured, they may be replaced by substituting in their place a like sleeve section corresponding to the par tieular blades removed.

The magazine D may conveniently be made of two castings having suitable ribs and flanges as indicated more fully in Fig. 2. rEhe magazine discharges upon the inclined grfrtes which are 'qupported by the hangers' J,""`and the'side grates themselves discharge upon the dumping gratesd 'is shown. rEhe upper surfaces y' of the side walls therefore serve, in a measurer as col(- ving surfaces for the fuel, before it strikes the linclined gratos themselves, and, more particularly, by reason of .he extra fitting of the projections or tongues i' with the grooves in which they are received, the pene tration of air from the ash pit L into the fuel directly above the magazine is prevented. I

Having thus described my invention what l claim is:

l. Feeding devices for inclined grate furnaces consisting of a trough unrestricted from end to end and having a'hOpper'seC- tion and a magazine section, and a feed screw having blades of. substantiallyequal pitch within the hopper section, and within the magazine section, said blades terminait ing well in advance of the rear end of -the magazine, said hopper section comprising a hopper and having a flaring outlet portion exto. ling from said hopper backward `to said magazine section to permit an unresiricted iiow of coal into said magazine seetion, and into the front end of the fire box.

2. T"ceding devices for furnaces Aconsisting of a trough having a hopper section and a magazine section; said magazine section being unobstructed from end to end and the side walls of said magazine and hopper seetions being in alinement. said hopper scction iaring upward directly from the hopper feed opening toward the magazine seetion, and a continuous feedscrew' of substantially uniform diameter operating in the bottom of the trough throughout the greater part of its length; substantially as described.

3. Feeding devices for furnaces consist- 'ing of e. troughA unrestricted from end to end having a hopper section and a magazine section, the side walls of said sections being in alinement, and the hopper section having a coal hopper at one end, and being of inA creasing area from the hopper feed opening onward, until it meets the magazine section, and a feed screw of uniform pitch and di anieter throughout, operating in the bottom of the trough, said feed-screw lyin partly in said hopper section and terminating well in advance of the rear end of the magazine; substantially as described. f

4. Feeding devices for inclined grate furnaces consisting of a trough located below the upper edges of'said gratos and having a hopper section and a magazine section, the side Walls of said sections being in alinement, said magazine section being unobstructed from end to end and said hopper 'section daring upwardly from the hopper pitch throughout, the sides of said trough .serving as coking surfaces for the coal before its delivery to the inclined grates; substantially as described.

in testimony whereof l aliix my signature,

in presence ofstwo witnesses.

AGERGE H. TEACHER, du.

Witnesses:

ARTHUR B. ST. JOHN, M. A. BILL.

eov 

